Air Brakes #1
Air Brakes Endorsement Test | New Mexico 2025 #1 Page 4 of 4
Train for FREE online with our New Mexico CDL air brake test. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a NM Class A/Class B driver license in 2025, practice as much as possible. Free sample tests published on our website will help you check and improve your knowledge and boost your grades. Please bear in mind that the requirements for CDL may vary from state to state.
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19 . Which of the following is not part of a vehicle’s air brake system?
Components of an air brake system include an air compressor, an air compressor governor, air storage tanks, air tank drains, an alcohol evaporator, a safety valve, a brake pedal, foundation brakes, supply pressure gauges, an application pressure gauge, a low air pressure warning signal, a stop light switch, a front brake limiting valve (on some older vehicles), spring brakes, and parking brake controls.
20 . If the safety relief valve in an air brake system is releasing air:
The safety relief valve in an air brake system releases air if necessary to prevent pressure in the system from becoming too high. If the valve starts releasing air, there is something wrong. Have a mechanic fix the problem.
21 . When parked on a flat surface, you should:
When parking on a level surface, you should use wheel chocks. If the vehicle is not equipped with spring brakes, this is essential to prevent the trailer from moving.
22 . What does an air compressor do in an air brake system?
In an air brake system, the air compressor pumps air into the air storage tanks. The air compressor is controlled by the air compressor governor.
23 . The air storage tanks:
The air storage tanks in an air brake system store compressed air to be used for braking. They hold enough air for the brakes to still be used several times if the compressor stops working.
24 . What can happen if the air pressure gets too low in an air brake system?
Pressing and releasing the brake pedal unnecessarily can let air out of the braking system faster than the compressor can replace it. Air brakes may cease to work effectively if the pressure becomes too low.
25 . If the low air pressure warning signal comes on in a vehicle with air brakes, the driver should:
If the low air pressure warning signal comes on while you are operating a vehicle with air brakes, you should stop and safely park the vehicle as soon as possible. It is essential that you are able to stop safely while you still have some braking power remaining.
2025 New Mexico | Frequently Asked Questions
A CDL Class B license in New Mexico is issued to drivers who operate commercial vehicles exceeding 26,000 pounds or towing vehicles not exceeding 10,000 pounds. This includes buses, dump trucks, tow trucks, or delivery trucks. It does not allow the operation of Class A vehicles but allows the holder to operate Class C vehicles if properly endorsed.
A Class B CDL license in New Mexico allows the holder to operate single vehicles with a gross vehicle weight rating (GVWR) of 26,001 pounds or more, or any such vehicle towing another not exceeding 10,000 pounds. This typically includes buses, dump trucks, straight trucks, and segmented buses.
To obtain a Class B CDL in New Mexico, you must be at least 18 years old (21 for interstate driving), possess a valid New Mexico driver's license, pass a vision test, and successfully complete both a knowledge test and a skills test. Additionally, you must provide proof of identity, residency, and social security number.
In New Mexico, to qualify for a Class B Commercial Driver's License (CDL), you must be at least 18 years old. However, if you plan to drive commercially across state lines (interstate commerce), federal regulations require that you be at least 21 years old.
While not necessarily required, specific endorsements can be added to a Class B CDL based on the type of vehicle you plan to drive or the cargo you plan to transport. Endorsements include passenger, school bus, tanker, hazardous materials (HazMat), and double/triple trailers. Each endorsement requires passing a specific knowledge test and sometimes a skills test.
The Class B CDL skills assessment in New Mexico includes three parts: pre-trip vehicle inspection, basic vehicle control, and on-road driving. Applicants must demonstrate their ability to inspect their vehicle, control the vehicle at low speeds, and drive safely in typical traffic situations, including turns, intersections, railway crossings, and various types of roadways.
Yes, there are limitations for Class B CDL license holders in New Mexico. They are authorized to drive single vehicles with a gross vehicle weight rating (GVWR) of 26,001 pounds or more, or any such vehicle towing another not in excess of 10,000 pounds. They cannot drive a vehicle that falls under the Class A CDL category.
Yes, in New Mexico, it is possible to take the written Class B CDL test in Spanish. However, federal regulations require that all CDL drivers must be able to read and speak English sufficiently to converse with the general public, understand highway signs and signals, respond to official inquiries, and make entries on reports and records.
Yes, in New Mexico, you can request accommodations for the Class B CDL written exam if you have a disability. These accommodations are designed to provide equal access to the Motor Vehicle Division services. However, you must provide appropriate documentation of your disability and specify the type of accommodation needed when scheduling your exam.
Yes, you can retake the Class B CDL written test if you don't pass on your first attempt. New Mexico requires a waiting period of at least one day before retesting. Additionally, retesting may involve an additional fee. It's recommended to review the CDL manual and consider additional study or training before retaking the test to increase your chances of passing.